Sewing-machine.



'L ONDERDONK. SEWING MACHINE. APPLICATION mw ocr. 9. |913.

Patentedept. 11, 1917.

y 3 SHEETS`SHEET l mendsept. 11, 19W;

a SHEETS-SHEET 2.

L'. ONDEHDUNK. I SEWING MACHINE. APPucAnoN FILED ocr. 9, 191s.

3 SHEETS-SHEET 3.

Patented sam. 11,1911?,

WITNESSES /NIf/ENUR lp'iafrarnY stares rariaiar prima.

LANSING ONDERDONK, OF NEW YORK, Y., ASSIGNOR TO UNION SPECIAL MACHINE COMPANY, OF CHICAGO, ILLINOIS,A CORPORATION GF ILLINOIS.

SEWING-MACHINE.

reaches.,

To all 'whom t may concern.'

Be it knownthat I, LANSING ONDERDONK, a citizen of the United States, residing at N ew York, in the county of New York, State of New York, have invented certain new and useful Improvements in Sewing- Machines, of which the following is a description, referencebeing had to the accompanying' drawing and `to the figures of reference marked thereon.`

The present invention rela-tes to new and useful improvements in ysewing machines, and more especially tothe construction of a sewing machine combined with a trimming attachment which is a development ofthe Dewees trimmer, illustrated in Patents Nos. 266,783 and 324,313, and in the patent to Durand, 698,912, granted April 29th, 1902. 1n these patents the fabric is severed by toggle-trimming members, which are provided with crushing or abrading surfaces, coperating one with the other to separate the material.

It has been found in practice, that when an unusual thickness of material to be severed passes between the jaws, the gooseneck or overhanging arm will spring upwardly slightly, and the jaws being `forced apart will snap back against each other, after the thick place has passed.

the toggle and prevents their proper working.' These toggles are simply brought together without unusual pressure upon them, and thus ought to sever thick material as well 'as thin, but this has not worked out perfectly in practice.

The object of the invention, therefore, is, first, to provide a novel construction of sewing machine frame for use 1n connection with such a trimmer, whereby the springing of the gooseneck or overhanging arm is pre` vented, and consequently the wear of the toggles much increased; and second, to provide a novel construction of the upper togglesupporting mechanism.

The invention, therefore, consists .in the means for carrying out the above objects, and in the matters `hereinafter described and referred to in the appended claims.

`Specification of Letters Patent.

This has the effect of chipping out the abrading surfaces of Patent-ea sept. ii, mit.

Application filed october 9, 191s. serial No. 794,279.

The invention is illustrated in theaceom- 4p anying drawings, in which,-

`the, adjustable member on the throat plate,

which is laterally movable with the trimming mechanism;

Fig. 5 is 'a plan view of the slide;

F ig. G is a side view of the same;

Fig. 7 is a sectional view through the work plate slide;

Fig. 8 isa detail in plan, showing a modified form of thethroat plate; and

Fig. 9 is a side view Vofthe same.

In these drawings, l represents the bed plate ofthe machine, and A the gooscneck or overhanging arm. To strengthen the gooseneck and prevent its springing, l cast the machine frame with avertical web or connecting piece B between the gooseneck and bed. It is understood that so far as this structure is concerned, it may be useful in other types of machines than those to which toggle trimmers are applied, although yit is of special value in such a machine, to prevent any springing of the gooseneck or overhanging arm.

The bed plate 1 of the sewing machine carries a bracket 2, on which is pivoted the lower toggle 3 of the trimming members. The main shaft Ll is connected to a rock lever 5, and said rock lever in turn moves the feed dog back and forth in a well known manner. A bracket 6 is connected to the rock lever 5, and vibrates therewith. Said bracket at its upper end is pivotally con nected to a link 7, which is pivotally con nected at its other end to the toggle member 3. i

A bracket 8 is secured to the bed plate near its lower end, and is attached by means of links and screws hereinafter referred to, at its upper end to the overhanging arm 10 of the machine. The upper toggle memwork plate bers.

ber 11 is provided with a tooth 12, which engages a recess 13 in the lower toggle member 3, and as the lower toggle member is vibrated, the upper toggle member 11 will be similarly vibrated. The upper toggle member is pivoted to a block 14 by a pivot screw 15.

When the screws 1S are loosened, the

block 14 may be adjusted vertically, and will carry with it the upper toggle trimming member 1l. A screw 19 is threaded into the upper toggle trimming member, and eX- tends through an arc-shaped slot in the block 14. A tension plate 20 is mounted on the shank of the screw 5, and the screw 19 passes through said tension plate, which latter operates to guide the upper toggle trimmer' in its vibrations.

The upper toggle trimmer rests directly on the upper surface of the lower trimming member, and said upper toggle trimming member is provided with a blunt surface,

which operates to bruise the material passing between the trimming members and thus separate the material. The block 14 is moved downward, so as to bring the `trimming members into proper cooperation by means of the wedge 21, which has a threaded stem extending through a bearing or sleeve formed in the upper end of the supporting bracket 8.

The lower face of the wedge 21 bears against the upper edge of the block 14. An adjusting screw 22 is threaded on the shank ofthe wedge 21, and rests against the bearing supporting the wedge 21. By turning V,the screw 22 in the proper direction, the

wedge 21 may be drawn to the right, as

.shown in Fig. 3, and will crowd the bearing block 14 downward,` thus increasing the pressure between the toggle trimming mem- By turning the adjusting screw 22 in the opposite direction, the wedge may be released, and the pressure between the trimming members likewise released.

The parts thus described are constructed `substantially as in the Durand patent, eX- Vcept as to the attachment of the bracket S to the overhanging arm. The mechanism lshown for holding the adjusting screw in adjusted position is not of my invention,

but is herein shown as consisting of thepawl and presses the opposite end of the pawl against the ratchet wheel. When it is desired to turn the adjusting screw so as to release the pressure betweenthe toggle members, the tail of the pawl may be pressed, the hooked nose thereofl thrown out of the ratchet, and the adjusting screw turned, so as to release the wedge.

The bearing or sleeve 23 on the bracket 8, through which the screw stem of the wedge 21 passes, is supported inthe ends of two parallel links 29, which at their opposite ends `are pivoted by means of screws 30 to the block 31, on the head of the machine.

The outer ends of these links 29 are squared ofi", as shown, to receive the lower ends of adjusting screws 32, passing through projecting lugs on the block 31. The strain, therefore, on the upper toggle is transmitted to the pivoted links, which are held from displacement by the screws 32, and the springing of the gooseneck is prevented by the web or connection B.

It will be seen, therefore, that the sleeve` which is on the bracket 8 is supported by the pivotal links, and when'the bracket and upper toggle member are set in the proper' position, the screws 32 are forced into position against the links 29, and thus a rigid structure is formed.

As fully described in the Durandpatent,

the bracket supporting the trimmer is capable of lateral adjustment whereby the trimr mer may be properly positioned relative to the stitching mechanism. This is accomplished in a general way by sliding the supporting bracket 2 by an adjustable rod 35. The bearing or sleeve 36 at the upper end of the bracket 8 is capable of slight lateral adjustment in the links 29 to permit of this adjustment of the trimmer relative to the needle.

l/Vhen the trimmer is adjusted laterally,

and slides in a race or recess extending from the front of the machine toward the stitching point in a direction parallel to the line of feed, and at one side thereof. This work ,plate slide is cut away las at 39, to

allow for the lateral adjustment of theA bracket carrying the trimmers. A sliding plate 40 is mounted on the work plate slide, and a spring 41 Vnormally presses said plate against the bracket 8. VSaid plate is guided in its back and forth movement 4by ther screws 42 shown in dotted lines in Fig. 5, and in full lines in Fig. 6.

A handle 43 may be provided for moving the slide away from the bracket when it is desired to withd aw the work pla-te slide. The slots in which the screws 42 are located, serve to limit the movement of the slide through the action of the spring 4l. This spring 4l is housed in a depending lug having a recess formed therein for this purpose. A lug is attached to the under face of the slide, and said spring bears against a shoulder carried by the slide 40.

In Figs. 8 and 9 I have shown the slide 3S as having a cut away portion, and said cut away portion is covered by a plate 42', which is rigidly attached to the bracket S by suitable screws 42. 'Ihis plate overlaps the work plate slide, and serves to close the opening formed therein, as clearly shown in the drawings.

Thile I have shown a vertical web or connecting piece B between the gooseneck and the bed, it will be obvious that other means may be employed for strengthening the overhanging arm, 'and for preventing the upward spring of said arm at the outer end thereof. It will also be obvious that minor changes in the details of construction may be made, without departing from the spirit of the invention, as set forth in the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

l. A trimming mechanism including a work support, an overhanging arm, a pivoted upper trimming member, adjustable means above the pivot of said trimming member and between said pivot and the overhanging arm whereby the upward thrust of the trimming member is taken up by the overhanging arm.

2. A trimming mechanism including a work support, an overhanging arm, an upper trimming member, a bracket supporting the same, and means located directly above the bracket and between said bracket and the overhanging arm for taking the upward thrust of the trimming member.

3. A trimming mechanism including a work support, an over-hanging arm, an upper trimming member, links on the overhanging arm, connections between the links and the bracket, and adjustable means between the links and the overhanging arm for taking the upward thrust of the trimming member.

4. A trimming mechanism including a work support, an over-hanging arm, an upper trimming member, a support therefor., a sleeve connected with the support, links pivoted on the over-hanging arm and embracing the sleeve, and stop screws carried by the ovcrhauging arm and bearing respectively on the 'free end of the links.

5. A trimming mechanism including a work support, an overhanging arm, an upper trimming member, a support therefor, a sleeve connected with the support, parallel links pivoted at one end to the overhanging trame, and at their free ends supporting t-he sleeve, and stop screws attached to the overhanging arm and bearing on the free ends oi' the links.

G. A trimming mechanism including a standard, a bed plate and an overhanging arm, an upp er trimming member, adjustable means located directly above the upper trimming member and between said upper trimming member and the overhanging arm, whereby the upward thrust of the trimming member is taken up by the overhanging arm, and a strengthening web or connecting piece between the overhanging arm and the bed plate.

7. A sewing machine including a bed plate, a standard, an overhanging arm, a trimming device having two members arranged in a vertical plane, one directly above the other, means located directly above the trimming members and between the trimming members and the over-hanging arm for taking up the upward thrust of the trimming members, and a strengthening piece extending substantially parallel with the trimming devices and its members for connecting the bed plate and said overhanging arm.

8. In a. sewing machine including a bed plate, a work support, a standard, and an overhanging arm, a trimming device including trimming members and a frame to which said members are attached, means whereby said trimming device can be adjusted toward and away from said standard, said work support being provided with openings or said trimming device and for access to the working parts of said sewing machine, one of said openings having a closing device provided with an adjustable part to compensate for the lateral movement of said trimming device.

In testimony whereof, I a'IliX my si gnature, in the presence of two witnesses.

LANSING ONDERDONK.

fitnesses t J. I'I. I-IownLL, C. D. CHURCHILL.

Gopies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents; Washington, D. C. 

